car is a 52 plate wrx sti, coming up with 3 faults, 1-mass or volume air flow A circuit low 2-cylinder 1 misfire detected 3-intake air temperature sensor 1 circuit high.
Car drives ok but lumpy, no funny nioses etc.
what is next thing to change? Oil, coil packs, plugs already been done.

 

maf is next step or ask some if you could borrow theirs.
ans if it clears plus check coil packs for hair line cracks

 

coil packs already been changed/swapped round. Would the maf make it run on 3 cylinders and cut out when cold?

 

definately maf sensor , change it for new , jobs a good un ( or seconfd hand one )

may make the car run on 3 or very lumpy at least

 

agree with above maf all the way m8